Dental manikin



Sept. 4, 1928.

R. L. HANAU DENTAL MANIKIN Filecl` Aug. l2, 1926 2 Sheets-Sheet Sept. 4, 1928.

l R. 1 HANAU DENTAL MANIKIN Filed Aug. 12, 1926 2 sheets-sheet 2 Patented Sept.. 4, 1928.

y orifice.

RUDOLPH L. HANAU, 0F BUFFALO, NEW YORK.

DENTAL Mamma.

`Application led August 1Q, 1926. `ieral No. 128,772

y My invention relates to a dental manilrin, an instrument for teaching and clinical demonstrations ot act-ual and hypothetical cases, it being adapted to replace articulators now used in collegesiand other dental institutions of learning'vvhen demonstrating mandibular movements and to replace the patient When making1 mandibular movements.

` The primary object of my invention is the production ot an instrumentof this kind bythe use of which pure geometric and Cinematical peculiarities of the jaw function governed bythe condylar joints can be repre-- sented, due to the adjustability oi the instrument. i

A further` object of my invention is the production of an instrument oi this kind by means of which measurements and records ot' CTI condylar conditions can be made in a man-` 9 ner similar to that required in observing or securing such conditions directly from a patient.

A further object of my invention is to pro vide an instrument of this kind by means i of which impression Work, measurements, and demonstrations of the resilientl and lil/re eitect` of the tissues are made possible, by inserting' suitable ridges, representing the gums of a patient, on the mounting supports attachable to the upper and lower auf-members of the instrument.

fl. still further object to provide an instrument of the lrind described, which pos refines .uoigel Ylfeatures olf construction and peculiarities in action which are adaptable for use in dental articulators. and whereby the results above referred to are attained in a simple. substantial and practicable manner, and furthermore, by thense of which students acquire sullicientslrill lor practica-l gein eral dental Work.

`The invention consists in the novel features of construction and in the arrangement and combination of parts to be hereinafter described and more particularly pointed out in the subjoined claims. i

In the drawingsy Fig. l is a side elevationof` the instrument used in connection with a combined standard and table clamp. Y

Fig. E2 is a liront elevation of the instrument and a portion of the upper end/ot the standard. i

j Fig. `l is a. plan vieyvw 4; is a transverse vertical` section taken on. line 4-47 Fig. 2, the mounting supports being' omitted. Fig'. 5 is an enlarged horizontal section taken on line tif-5, Fig. 2. j i. i

Fig. 6 is an enlarged vertical section taken on line G-6, Fig`- It, looking` inthe direction ol the arrow crossing said line. i i

7 is an enlarged vertical longitudinal section taken on line 7 7, Fig. 5. il

Fig'. 8 is `a partial side elevation. showing the cover plate removed. i i

Fig. 9 is a transverse section taken on line o ie,rig.i5. j i j j Y Figi. l() is a View silnilarto` Figi". S, shovva modified form i ably adjustable dish mounts.

The manikin proper is` designated by the numeral l, and it is mounted upon a stand ard l2 which may, itdesired, have a suitable base at its lower end to supportthe same; but in the manner shown is vertically adjustable Within a table or `bench clamp 13. This table `or bench clamp comprises an openworlr frame or body portion lll having` a table or bench jaw l5, and a screw support` 16 alined with said jaw l5 through which a` clamping;l screw 17 is passed, the jaiv l5 being adapted `to rest upon the table or bench designated? for example, by the numeral 18, While the clamping screw 1T, is forced firmly inl contact with the underside oit said table or bench.` .j i

`The standard l2 provided `with a series ot' circumferential grooves 19 spaced apart alone; the length thereotlin any of which; a lock stud 2O is adapted to be centered,` said stud prejecting` axially from one tace of periphorally lnourled `dishF troni the` other tace of which axially entends screnY 22' threaded into the openvorl frame ld, the stud 2l), disk 2l and screw forming `a lock device forthe standard l2. j

i The manil-rin has an upper janv member 23` rigidly mounted upon the upper end of the standard l2, and a lower jaw member 24p-i suspended iiomthe upperv au' member in a manner to be particularly described herein-` after. j j The upper jaw member comprises an oblonglongritudinallyeisposed body 4portion from opposite endsfoiE `which pivot supports 26 extend and forwardly trrn which a. particirculsr jaar 2T eaeiids7A sa jan' toprofv of `operating the.` rotatlill:

lila

. shown,

ving a circular depression of a patient and hav- 28 formed in the extending into the senting the upper jaw Extending centrally from the rear of said oblong body portion is a boss 31 into or through which the upper end of the standard 12 is passed. In the particular instance the standard 12 has its upper end reduced, as at 32, and its terminal threaded, as at 33, the reduced portion being passed through the boss 31 and having a securing nut 34applied to its threaded portion and bearing `against the upper while the shoulder formed on the rod by reducing the upper end thereof has the lower end of said boss bearing thereagainst. In this manner'the up er jaw member is firmly secured to the standard.

The pivot supports 26 have longitudinally alined circular openings 35 formed therethrou h, the outer ends of which are enlarge as at 36, to provide outwardly facing shoulders 37 in said openings. Arranged within said alined openings are pivot mounts for the lower jaw member 24, preferably in the form of rotatably adjustable disks or disk mounts 38. Each disk mount is provided with a circumferential flange 39 along part of which gear teeth 40 are cut or other- `wise formed, said gear teeth forming a segmental gear integral `with the disk mount, and each of these disk mounts is reduced in diameter at its outer end, as at 41.

The circumferential flanges 39, or gear flanges as they may be termed, Iit into the enlarged portions of the alined openings 35, while the reduced outer ends thereof extend outwardly beyond the outer faces of the ypivot supports 26 `in which said openings are forme Formed in the ends of the oblong body portion 25 are substantially circular depressions 42, in which pinions or gear wheels 43 are rotatably arranged, said gear wheels having bosses 44 on their inner sides fitted into co-axial sockets 45 in said depressions 42, and extending inwardly from saidV sockets are co-axial bores 46. These gear wheels 43 are provided with axially-disposed bores 47, the axes of which are coincident with the bores 46 formed in the body portion 25. A pin 48 is passed diametrically `through the boss 44 of each gear wheel 43,

serving as a means for cooperation with a specially designed key, to be hereinafter more particularly described, for rotating said gear wheels. y

49 represents cover plates, one being adapted to be secured to each end of the side of said boss,

body portion is adapted to extend. Said openings 50 are therefore coaxial with the openings 35 in the depending pivot supports 26. These plates fit against the gear anges 39 of the disk mounts and prevent outward movement of said mount-s, while the inner movement of said mounts is prevented by reason of said gear flanges bearing against the shoulders 37 formed in the openings 35. Each of these cover plates is provided with a key hole 51, and these key holes inthe cover plates are co-axialwith the bores in the gear wheels 43 and the bores 46 formed in the body portion 25. `At intervals around securing screws 52 are passed therethrough` and threaded into thebody portion 25, thus firmly securing the cover plates in'position and completely concealing the means provided :for rotatively adjusting the disk mounts.

Each of the disk mounts 28 is provided with a circumferential groove 53 into which isy adapted to be tightened a set or lock screw 54 threaded and concealed within a tapped opening 55 extending inwardly from the rear of the body portionV 25, said set screw having a specially formed axial socket 56 in its outer end; in this` particular instance the socket being illustrated as hexagonal.

Threaded into the outer end of each of the tapped openings 55 is a flanged sleeve 57, the flange of which bears against the rear side of the body portion 25, the opening through said sleeve being preferably cylindrical and slightly larger in diameter than the socketed set screw which it conceals.

For rotatably adjusting the disk mounts and for securing the same in any adjusted position, a special key 58 is employed, this key being shown in full lines in Fig. 9, and in dotted lines in Fig. 6. The key has a cylindrical shank 59 diametrically slotted at its inner end, asat 6() and provided with a head 61 at its outer end. Passed through i screws 54; these screws being loosened to permit the disk mounts to be rotated. For rotatively adjusting the disk mounts, the shank 59 of the key is passed through the key holes in the cover plates 49, through the bores of the gear wheels 43, and into the" bores 46 formed in the body portion 25 so that the pins 48 extending diametrically across the bores of the gear wheels are inbeveled or made to recede outwardly toward their peripheral edges and they are adapted to co-act `with centering stops or studs 83 projecting inwardly from the inner faces of the disk mounts 26 in line with the guideways in said mounts. These stops `have their inner ends made conical the taper of which conforms to the bevel oi the centering disks 74 adapted for contact therewith.

In the lower jaw 24 a screw stud 84 is rotatably arranged, said screw stud being similar to the screw stud 29 in the upper jaw and beingl normally alined therewith. The screw studs 29 and 84 are adapted to have mounting supports or plates 85 threaded thereonto, on both of which suitable dentures are to be mounted by the use of plaster of Paris or other plastic material, as is common in dental practice. i

As the upper jaw member is rigidly secured to the standard 12 and the lower jaw member is pivotally suspended from said upper jaw member, `manipulation of the instrument or device necessitates the movement of the lower jaw member. 'When the spherical terminals of the pivotrods 7 9 are axially disposed within the disk mounts, regardless of the radial direction to which the guideways in said mounts are adjusted, the ecntering disks 74 will be in contact with the centering stops or studs 83, and in this position the jaws of the instrument will be in the position of occlusion, often referred to as cent-ric position. At such times the pivot rods will be drawn outwardly to their full-` est extent. i i

Protrusive position is" attained by movingr the lower jaw member `forwardly, .at which time the spherical terminals of the pivot rods 79 are moved outwardly in the guideways of the disk mounts, with the result that the centers of said spherical terminals are brought closer together, thisbeing efected by reason of the inward deviation of said guideways from the plane of rotation of the disk mounts, and this forward movement causes the pivot rods 79 to be moved slightly inwardly into the sleeve 71 supporting them, the degree of protrusion being in accordance with the extent of movement of" the spherical terminals of the pivot rods out# wardly along their guideways. When moved outwardly to their full extent, the inner ends of the pivot rods 79 will be Vin contact with the center stop or abutment 76 within the sleeve 71. i

The protrusive movement may be effected regardless of the positions of the guideways, except when said guideways are positioned at 90 degrees of the plus graduation, under which conditions no protrusion of the lower jaw can take place, as the only efect would be to move the pivot rods inwardly while the lower jaw member is moved downwardly' away from the upper jaw member. The de gree of protrusion, of course, is determined y they minus i or plus inclination in the guidewa s, the greatest degreeof protrusion being al owable when the guideways are set at zero, at which time they are in substan-l tially horizontal position extending directly forward from the axis ofthe disk mount.

Lateral relation of the lower jaw 66 with reference to the upper jaw is effected by retaining the spherical terminal of one of the pivot rods 79 in its innermost osition, or axially within its comperating dis mount while moving the sphericalterminal of the other pivot rod outwardly within its guideway, this being accomplished irrespective of the inclination of the guideways within said disk mounts. The inclination inward ly toward each other, or deviation of said guideways from the planes of rotation of the disk mounts in which they are formed, provide for a most effective relative adjustment of the jaws. It is, of course, understood that when the jaws are moved relatively laterally, a component protrusive movement takes place, which is a true reproduction of the lateral movement created by the human jaw.

It will be apparent therefore that when centric relation of the jaws exist, the spherical terminals et the pivot rods 79 will be axially disposed within the disk mounts 28; or this may be expressed b stating that said spherical terminals willv e at the inner ends `of their guideways. When "true protrusive relation of the jaw members exist, the spherical terminals of saidv pivot rods will be at the outer ends oftheir guideways; and when lateral relation of the jaw exists, one of said spherical terminals will be positioned outwardly in its guideway to a greater degree than the other spherical terminal, or one of said spherical `terminals will `be atrthe inner end of its guideway while the other is positioned outwardly to the necessary degree.

In some cases where the normal centric or occlusive position of one of the jaws in a patient extends forwardly to a greater degree than the other, a similar centric or ocelusive relation is provided in this device by the use of stop screws 86 threaded into the disk mounts 28 from the peripheral edge thereof in alinement with the guideways 1n said mounts, and when these stop screws are positioned to cause the inner ends thereof to project into the guideways of said disk mounts, the extreme inward positions of the centers of the spherical terminals of said pivot rods 79 will be forward of the axes of said `disk mounts, all other adjust-ments or manipulations ofthe device being edeeted in the same manner as hereinbefore described.

While I preferably employ on each disk mount 28 a segment and associate therewith lll `jaw members havin `peripheral grooves in sai ing opposite pivot extensions provided. with terminal enlargements fitted into and adapted for movement along said guideways.

10. A dental instrument, comprising two relatively movable jaw members, one of said spaced pivot supports provided with aline circular openings, disk `'mounts vrotatably adjustable within said openings and having guideways therein extending fiom their j centers outwardly, means for locking said pivot mounts against lrotatable movement, and `meansfor rotatably adjusting said pivot mounts when unlocked, the other jaw member having opposite pivot` extensions projecting into said ldislrmounts and `being provided with terminal enlargements fitting` said -guideways 11. Avdental instrument, comprising two relatively movable jaw members, one of said jaw members having spacedA pivot supports provided with circular openings, rotatably adjustable diskinounts within said circular openings, each disk mount havi a peripheral groove and a peripheralnange provided with gear teeth, gear wheels meshing with the gear teeth of saidv peripheral flanges, and lockcrews extending into said peripheral grooves,l the other jaw member avng pvot extensions entering said disk mounts and being slidably disposed for vmovementtoward and from the axes thereof.

j 12. A dental instrument, comprising a ii'xed.` jaw member having spaced parts provided vvith alined circular openings, disk mounts rotatably adjustable within said alined openings, each disk mount having a gpideway therein trending at an angle to t e` plane` of rotation thereof and being provided with `a-peripheral groove and a peripheral flange equipped with gear teeth, cover lates applied tothe outer sides of said spac parts and retainingthe y,rotatably adjustable disk mounts therein, said cover plates having `lie 'holes therein, gear elements within eac i .ofL said lspaced parts in mesh with the gear `teeth of said peripheral ilangesand concealedby ,said` cover plates, said gear elements being rotatably operated through said keyholes, andlock screws in said spaced parts and ada ted to enter the p disk mounts to Voelr the latter against rotatable adjustment, the other jaw member having opposite ivot extensions provided with enlarged terminals fitted into said guideways.

13. A dental instrument, comprising two` relatively movable jaw members, one of said jaw membershaving spaced arts provided with guideways of substantial y circular formation in crosssection, and the other being disposed between said fixed parts and having opposite pivot 'extensions provided `with spherical enlargements` slidably arranged j within said guideways.

14. A dental instrument, comprising two supports depending from relatively movable v`jaw members, one of said jaw members having spaced parts provided with `pivot guideways and with centerin elements extending inwardly` from said spaced parts, the other jaw member having a cross member at its upper end and pivot extensions projecting into said guideways for movement therein opposite ends of said cross member being a apted for contact with said centering elements to determine normal centricrelation of said jaw members.

15. A dental instrument, comprising a xed jaw member and a movable jaw member, said fixed jaw member having spaced parts provided with guideways and said movable jaw member having a cross member ,disposed between said spaced parts and proand a movable 'aw member provided with a i cross member isposed betweensaid spaced parts and having a bore extending inwardly from each end thereof, and pivot members longitudinally slidable within said bore and having terminal enlargements ittiaig into said guideways, said pivot members being limited in their inward movement within said bores by the inner ends of the latter. y

17. A dental instrument, comprising `a fixed jaw member having an oblong body portion, a parti-circular `jaw extending forwardly from said body portion and ivot op osite e s of said body portion, a pivoteciJ 'aw member comprising a cross member.,

tween said pivot supportsand provided with oppositevpivot elements rotatably and slid 8.

1y mounted in said pivot supportaarms depending from opposite ends of said cross member, and a jaw connecting the lower ends of said arms and extending forwardly therefrom. i i i 18. A dental instrument, comprising `a fixed-` jawmember having a forwardly extending jaw, and` s aced pivot supports, a movable jaw mem r `comprising a cross member disposed between said pivot su ports, arms depending from opposite. en s yof said crossmember, a jaw connecting said 4arms and extending forwardly i therefrom,

aV sleeve mounted' in said cross member, and pivot elements slidably entered into said sleeve from opposite ends and havinvr their outer terminals pivotally and slidabijy supported within said spaced pivot supports.

sposed, 1 bei 19. A dentel inetrinnent, Comprising two relatively movable jaw members, one ot seid members having.;` spaeed parts provided with gnideiveys and having also centeringl stops exteiiding inwardly from their inner faces, seid centering Stops having conical outer ends, the other jew member lieving e cross member disposed between seid spaced parte end provided with beveled terminals adaptf ed for eo-eetion with the eeniezil ends oi' sind centering stops, end pivot elements nio.

ject-ing :trom opposite ends oi' seid cross member end rotatably ond slidabiy positioned within seid guidewziys.

20. A dental instrument, comprising; n tilted jew member having spaced parts provided with eirenler openings and sobstnn` tielly Circuler depressions, diel mounts Within seid eironler openings having 2guidevvaiys and e peripheral ilenge equipped with gen1" teeth, @over plates mwlied to the outer sides oi' seid spaced parts concealing the peripheral flanges of seid disk mounts and having e hey hole therein, gear Wheels mounted in seid Circuler depressionsin mesh with the teeth of seid peripheral flanges and having an opening; therethrough and e pin extending diemetriezilly through seid opening, the openings oi seid gear Wheels being elined with the key holes in seid Cover plates to permit the insertion oi e slotted key therethrough for rotating seid geur Wheels through the medium ol seid diametrel pin, and e movable jew member having opposite pivot elements entered into said guideweys.

2l. A dental instrument comprising e, fixed janv member, and e movable javv mem ber eri-operatively supported with respect to seid fixed jew member, seid movable jew member having longitudinally movable eupported pivot elements projecting laterally therefrom for pivotzilly end slidebly enpport-ing said movebleujaw member.

ln testimony Whereol I nihil: nly signature.

RUD OLPH` L. HANAU. 

